code: def is_variable(x, /, *, exclusive=False):
      return isinstance(x, mx.ndarray.NDArray)
  
file_path: ivy/ivy/functional/backends/mxnet/gradients.py
imports: from typing import Sequence, Union
  import mxnet
  from ivy.utils.exceptions import IvyNotImplementedException
label_desc: Use image node_id 2 for calling a global function with example usage: is_variable() and returns: isinstance